Elevating device for the worktable of a manual planer

ABSTRACT

An elevating device for the worktable of a manual planer includes at least one base, one movable worktable and one elevating device. The elevating device is composed of a driving shaft, a driven shaft, a rotary base, a connecting rod base, a combining shaft and a spindle. When an operating member of the driving shaft is rotated, a driving gear of the driving shaft will drive a first driven gear of the driven shaft to rotate, and a second driven gear of the driven shaft will drive a third driven gear of the rotary base to rotate at the same time. Simultaneously, the rotary base will be rotated to actuate the connecting rod base to operate, and the movable worktable positioned on the connecting rod base will be moved upward or downward and adjusted in its position.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a manual planer, particularly to one providedwith an elevating device simple in structure and able to quickly andaccurately adjust and fix its worktable in position.

2. Description of the Prior Art

Generally, a conventional planer is provided with an elevating devicefor adjusting the position of a work piece to be processed. Theelevating device of the conventional planer is provided with anelevating rod able to be actuated to move up and down for driving asupport shaft to move and quickly adjust the position of the worktableof the planer. The elevating device is further disposed with amicro-adjusting rod for carrying out micro-adjustment for the worktable.By so designing, the elevating device of the conventional planer is ableto carry out quick adjusting, and micro-adjusting and positioning forthe worktable of the planer. However, in adjusting of the worktable, theelevating device has to carry out quick positioning first, and thenmicro-adjust and fixing the level of the worktable; therefore, it isnecessary to take much time to carry out such two-step adjusting andpositioning. In addition, the elevating device is located under amovable worktable so a user has to apply force from under for carryingout adjusting of the movable worktable, resulting in much inconveniencein operating and using.

SUMMARY OF THE INVENTION

The objective of this invention is to offer an elevating device for theworktable of a manual planer, including at least one base, one movableworktable and one elevating device. The elevating device is composed ofa driving shaft, a driven shaft, a rotary base, a connecting rod base, acombining shaft and a spindle. When an operating member of the drivingshaft is rotated, a driving gear of the driving shaft will drive a firstdriven gear of the driven shaft to rotate, and a second driven gear ofthe driven shaft will drive a third driven gear of the rotary base torotate at the same time. When the rotary base is rotated relatively withthe spindle serving as a pivot, the connecting rod base will be actuatedto operate, and the movable worktable positioned on the connecting rodbase will be moved upward or downward and adjusted in its position. Theelevating device for the worktable of a manual planer of this inventionis simple in structure and able to adjust the position of the worktablewith only one step operation. In addition, the operating member of thedriving shaft can be turned with less force, convenient in use.Moreover, during carrying out adjusting of the planer, the elevatingdevice of this invention can quickly and accurately adjust and fix theworktable in position.

BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to theaccompanying drawings, wherein:

FIG. 1 is a perspective view of a first preferred embodiment of a manualplaner in the present invention;

FIG. 2 is a perspective view of the first preferred embodiment of anelevating device for the worktable of the manual planer in the presentinvention;

FIG. 3 is an exploded perspective view of the first preferred embodimentof the elevating device for the worktable of the manual planer in thepresent invention;

FIG. 4 is a cross-sectional view of the first preferred embodiment ofthe elevating device in a condition of quickly adjusting a movableworktable in the present invention;

FIG. 5 is a cross-sectional view of the first preferred embodiment ofthe elevating device in a condition of quickly adjusting and shiftingthe movable worktable in the present invention;

FIG. 6 is a side cross-sectional view of the first preferred embodimentof a locking button combined with other members in the presentinvention;

FIG. 7 is a perspective view of a second preferred embodiment of anelevating device for the worktable of a manual planer in the presentinvention; and

FIG. 8 is a perspective view of a third preferred embodiment of anelevating device for the worktable of a manual planer in the presentinvention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A first preferred embodiment of an elevating device for the worktable ofa manual planer in the present invention, as shown in FIGS. 1, 2 and 3,includes a base 10, a movable worktable 20 and an elevating device 30 asmain components combined together.

The base 10 has its right side bored with a through insert hole 11.

The movable worktable 20 is slidably assembled at the end of the rightside of the base 10.

The elevating device 30 is composed of a driving shaft 31, a drivenshaft 32, a rotary base 33, a connecting rod base 34, a combining shaft35 and a spindle 36.

The driving shaft 31 has its front end provided with an operating member311 composed of a rotary wheel 3111 and a handle 3112 pivotally fixed onthe rotary wheel 3111 for a user to hold thereon and carry out adjustingof the movable worktable 20. Referring to FIGS. 3 and 6, the drivingshaft 31 is provided with a threaded section 3113 at one endcorresponding to the rotary wheel 311 for a threaded hole 3115 of alocking button 3114 to be threadably secured thereon to let the innerend of the locking button 3114 tightly pressed on the outer side of therotary wheel 311 for stopping the rotary wheel 311 from operating. Thedriving shaft 31 has its front end inserted through the insert hole 11of the base 10 and the rear side of the front end of the driving shaft31 is provided with a driving gear 312 made of a worm.

The driven shaft 32 is positioned under the driving shaft 31 andvertically intersecting with the driving shaft 31. The driven shaft 32has one side provided with a first driven gear 321 made of a worm gearat a location corresponding to the driving gear 312 of the driving shaft31, with the first driven gear 321 engaged with the driving gear 312.The driven shaft 32 has the other side provided with a second drivengear 322 made of a worm.

The rotary base 33 is to be assembled on the second driven gear 322 ofthe driven shaft 32, having its bottom disposed with a third driven gear331 made of a sector worm gear to match with the second driven gear 322of the driven shaft 32 so that the third driven gear 331 and the seconddriven gear 322 can be engaged with each other. Further, the rotary base33 has its topside formed with a rotary member 332 axially bored with aninsert hole 3321, a first through hole 333 between the third driven gear331 and the insert hole 3321, and a second through hole 334 between theinsert hole 3321 and the first through hole 333.

The connecting rod base 34 is bored with a threaded hole 341 at alocation corresponding to the second through hole 334 of rotary base 33,secured at the front side of the rotary base 33 by means of a screw 342.The connecting rod base 34 has its upper side axially bored with acombining through hole 343 at a location matching with the insert hole3321 of the rotary base 33 and a through shaft hole 344 at a locationtallying with the first through hole 333 of the rotary base 33. Themovable worktable 20 is axially assembled on the topside of theconnecting rod base 34. In addition, the connecting rod base 34 has itscentral opposite sides respectively and longitudinally fixed thereonwith a positioning block 345 at a location matching with the movableworktable 20. The positioning blocks 345 have their upper sidesrespectively formed with a slope of 45 degrees for restricting themovable worktable 20 to move upward or downward within 45 degrees.

The combining shaft 35 is to be axially inserted through both the inserthole 3321 of the rotary base 33 and the combining hole 341 of theconnecting rod base 34, having its opposite ends respectively providedwith threads 351 secured thereon with a nut 352 for fixing the combiningshaft 35 at the upper sides of the rotary base 33 and the connecting rodbase 34. The combining shaft 35 is also inserted through the oppositesides of the movable worktable 20 so as to push and actuate the movableworktable 20 to move upward and downward.

The spindle 36 is axially inserted through the first through hole 333 ofthe rotary base 33 and secured in the shaft hole 344 of the connectingrod base 34.

In operating and using, referring to FIGS. 3 to 6, firstly, the handle3112 of the operating member 311 is turned to drive the rotary wheel3111 to rotate and actuate the driving gear 312 to rotate andsynchronously, the driving gear 312 engaged with the driven gear 321 ofthe driven shaft 32, will actuate the driven shaft 32 to rotate.Simultaneously, the third driven gear 331 of the rotary base 33, engagedwith the second driven gear 322 of the driven shaft 32, will be drivento rotate by the second driven gear 322, and the rotary member 332 andthe third driven gear 331 of the rotary base 33 will be rotatedrelatively with the spindle 36 acting as a pivot. When the rotary member332 of the rotary base 33 is rotated, the connecting rod base 34 securedwith the rotary base 33 by the combining shaft 35 will be synchronouslydriven to operate, and the movable worktable 20 axially assembled on theconnecting rod base 34 will be actuated to move upward or downward. Whenthe movable worktable 20 is properly adjusted in position, the lockingbutton 3114 is pressed and turned to have its threaded hole 3115 firmlysecured on the threaded section 3113 of the driving shaft 31 to stop therotary wheel 311 from rotating for fixing the elevating device 30.

A second preferred embodiment of an elevating device for the worktableof a manual planer in the present invention, as shown in FIG. 7, hasalmost the same structure and function as those described in the firstpreferred embodiment, except that the driving gear 312 of the drivingshaft 31 is made of a sector gear and the first driven gear 321 of thedriven shaft 32 is also made of a sector gear. The driving gear 312 isengaged with the driven gear 321 for driving the driven shaft 32 torotate, and by interaction actuating the movable worktable 20 to moveupward or downward.

A third preferred embodiment of an elevating device for worktable of amanual planer in the present invention, as shown in FIG. 8, has almostthe same structure and function as those described in the firstpreferred embodiment, except that the base 10 has its left sideadditionally provided with a second movable worktable 20 and a secondelevating device 30 for adjusting the position of the second movableworktable 20.

Evidently, the elevating device for the worktable of a manual planer inthe present invention is simple in structure and able to adjust theposition of the worktable of the manual planer with only one stepoperation, and the operating member of the driving shaft can be operatedwith less force, convenient in use. Additionally, the worktable of themanual planer can be quickly and accurately adjusted and fixed inposition by the elevating device of this invention.

While the preferred embodiments of the invention have been describedabove, it will be recognized and understood that various modificationsmay be made therein and the appended claims are intended to cover allsuch modifications that may fall within the spirit and scope of theinvention.

1. An elevating device for a worktable of a manual planer comprising: abase; a movable worktable slidably assembled at one end of said base;and an elevating device composed of a driving shaft, a driven shaft, arotary base, a connecting rod base, a combining shaft and a spindle,said driving shaft axially and pivotally inserted in said base, saiddriving shaft fixed with an operating member at one end corresponding tosaid base, said driving shaft provided with a driving gear at one sideopposite to said operating member, said driven shaft verticallyintersecting with said driving shaft, said driven shaft disposed with afirst driven gear at one side corresponding to said driving gear of saiddriving shaft and a second driven gear at another side, said rotary baseprovided with a third driven gear at a location matching with saidsecond driven gear of said driven shaft, said connecting rod basesecured at a rear side of said rotary base by means of said combiningshaft, said spindle axially inserted through said rotary base and fixedin said connecting rod base, said operating member of said driving shaftoperated to let said driving gear driving said first driven gear of saiddriven shaft to rotate, said second driven gear of said driven shaftrotated to actuate said third driven gear of said rotary base to rotate,said rotary base with said spindle acting as a pivot actuated to carryout relative rotation and actuate said connecting rod base to operate,said movable worktable on said connecting rod base actuated to moveupward or downward together with said connecting rod base and adjustedin its position.
 2. The elevating device for worktable of a manualplaner as claimed in claim 1, wherein said rotary base is assembled onsaid second driven gear of said driven shaft, and said third driven gearformed at a bottom of said rotary base is engaged with said seconddriven gear for mutual transmission, said rotary base having its topsideformed with a rotary member, said rotary member axially bored with aninsert hole and a first through hole at a longitudinal location betweensaid third driven gear and said insert hole, said rotary base furtherbored with a second through hole between said insert hole and said firstthrough hole, said connecting rod base axially bored with a combininghole and a shaft hole respectively corresponding to said insert hole andsaid first through hole of said rotary base, said combining shaftaxially inserted through both said insert hole of said rotary base andsaid combining hole of said connecting rod base, said combining shafthaving its opposite sides respectively engaged with a nut for securingsaid combining shaft at upper sides of said rotary base and saidconnecting rod base, said spindle axially inserted through said firstthrough hole of said rotary base and fixed in said shaft hole of saidconnecting rod base.
 3. The elevating device for the worktable of amanual planer as claimed in claim 1, wherein said driving gear of saiddriving shaft is made of a worm, while said first driven gear of saiddriven shaft is made of a worm gear.
 4. The elevating device for theworktable of a manual planer as claimed in claim 1, wherein said drivinggear of said driving shaft is made of a sector gear, while said firstdriven gear of said driven shaft is relatively made of a sector gear. 5.The elevating device for the worktable of a manual planer as claimed inclaim 1, wherein said second driven gear of said driven shaft is made ofa worm, while said third driven gear of said rotary base is relativelymade of a sector worm gear.
 6. The elevating device for worktable of amanual planer as claimed in claim 1, wherein said operating member ofsaid driving shaft is composed of a rotary wheel and a handle pivotallyfixed on said rotary wheel to be held for carrying out adjusting of saidmovable worktable.
 7. The elevating device for the worktable of a manualplaner as claimed in claim 1, wherein said driving shaft is providedwith a threaded section at one side corresponding to said rotary wheelfor a threaded hole of a locking button to be secured thereon to enablean inner end of said locking button to be tightly secured on saidthreaded section for stopping said rotary wheel from rotating.
 8. Theelevating device for the worktable of a manual planer as claimed inclaim 1, wherein said connecting rod base has its central opposite sidesrespectively and longitudinally fixed with a positioning block at alocation corresponding to said movable worktable and each saidpositioning block has its topside formed with a slope of 45 degrees forrestricting said movable worktable to be moved upward or downward within45 degrees.
 9. The elevating device for the worktable of a manual planeras claimed in claim 1, wherein said base has another side endadditionally assembled with a second movable worktable and a secondelevating device for adjusting and fixing said second movable worktablein position.